Machine for forming tubes.



J. L. HOSACK. MACHINE FOR FORMING TUBES. APPLICATION FILED SEPT- no.19H.

Patented MayM, 1918.

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Ham-s5 I. L. HOSACK.

MACHINE FOR FORMING TUBES.

APPLICATION FILED SEPT- I0. I91].

Patented May14, 1918.

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1311mm .MMEE Lwamlt J, L. HOSACK. MACHINE FOR FORMING TUBES. APPUCATIONHLED SEPT. I0. l9! 1.

Patented May 14, 1918.

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JAMES LUTHER HOSACK, or WOODSTOCK, TUBE a-runcn 00., LTD., or

ONTARIO, CANADA, ASSIGNOR TO STANDARD WOODSTOCK, ONTARIO, CANADA.

MACHINE FOR FORMING TUBES.

Specification of Letters Patent.

Patented May 14, 1918.

Application filed September 10, 1917. Serial No. 190,526.

To all whom it may concern.

Be it known that I, JAMES LUTHER Ho- SACK, a subjectof the King of GreatBritain, residing in thecity of \Voodstock, in. the

rovince of Ontario, Dominion of Canada, have invented certain new anduseful Im provements in Machines for Forming Tubes, of which thefollowing is a specification.

This invention relates to in'iprovements in machines for forming tubesof the type in which tubes are formed from strips of metalpassedlongitudinally through a plurality of forming rolls and dies, togive them their final shape and the objects of the invention are toenable the forming operation to be more effectually perforn'ied.

According to the present invention, a forming roll having a stationaryaxis is provided adapted to cooperate with a series of flat dies inendless chain formation adapted to move axially with the tube over aplane surface opposite the roll in the manner hereinafter explained andmore fully set forth in the accompanying specification and drawings.

Referring to the drawings:

Figure 1 is a side iew of the portion of the machine embodvinc' the preent invention.

Fig. 2 is a longitudinal sectional v therethrough.

Fig. 3 is a perspective view of one of the flat forming dies.

Fig. 4 is a plan view of one of the flat forming dies.

Fig. 5 is a cross sectional view of one of the flat forming dies.

Fig. 6 is a transverse section through one of the forming rolls anddies.

In the drawings like characters of reference indicate correspondingparts in each figure.

The present invention is designed to form part of a tube formingmachine, and the function performed by the cooperating rolls and dies.which depends upon the shape of the die surface, is usuallv that ofeffecting the final closing of the tube.

Referring to the drawings. A represents the frame of the machine whichsupports a plurality of pairs of rolls B. single rolls 10 and guides ll.The nature and construe tion and number of the forming rolls and diesdoes not form part of the present invention, and is disclosed in theUnited States ie W Patent No. 724426.

Certain of these rolls will be driven by gearing in the usual way todraw or force the metal which is to be formed through the machine.

he present invention includes a fori'ning roll C having a stationaryaxis and an end less series of flat forming dies D. The stationary rollis supported from suitable adjustable bearing blocks 12 of any desiredcharacter. The roll (1 may be power driven if desired. or may simply bepermitted to be turned by the frictional contact of the tube as it isdrawn through the machine.

The endless series of forming dies D comprise carriers 13 and die blocks14 mounted on the carriers. Each carrier is formed on opposite ends withlugs 15 adaptedto enter between lugs 16 and 17 on the adjacent blocks,the said lugs being adapted to receive a suitable pivot pin 18, wherebythe carriers form an endless chain. The die block 14 itself may be madeof steel heat treated for proper hardness and. suitably grooved for thesize of the tube. It is fastened to and held in alinenient with thecarrier by a tongue 19 fitting in a groove 20 in the carrier, being heldtherein by suitable means, such as dowel pins 21 and fillister headedcap screws 22.

The endless series of carriers 13 are guided in position opposite theforming roll C by means of a semi-circular uide-way E, having sideflanges 23 and 24 eld in position by the screws 25 and 26. The guide wayitself is adjustably held in position, the means I have shown toaccomplish this comprising clamping bolts 27 extending through the frameand through slots 28 in a flange or web 29 on the guide way.

The guide-way E is formed opposite the roll C With a flat or plane face30, the length of which is equal to or greater than the length of two ofthe dies, whereby two of the dies will always be in position oppositethe forming roll with their faces in alinement, and parallel to the axisof the tube being formed.

In practising the invention, a steel strip of suitable thickness andwidth is fed to the machine and the tube is gradually formed by anumber, which may be five, or more pairs of rolls B, the surface of therolls being suitably ooved to gradually bend the strip into a mostperfect circular form. The tube thus formed is then suband withoutibeingtuneler the necessity of transferring the tube to a separate closingformer.

The degree of pressure.by the roll and die blocks may be regulated bythe adjustable screws30, operating to move he ring blocks 12 in theguide way 31. It wi'l also be evident that my improved forming rollseries of die blocks may be applied to some ofjthe preliminaryoperations in the femur tion of tubing, and not merely for finally(losing and setting the joint of the tube. By variations in the form ofdie surfaces, various kinds of cylindrical, oval and angular shapes maybe made.

\Vhat I claim as my invention is:

1. In a tube forming machine, in combination, a pivoted forming roll, asupport for the tubeto be formed comprising a stationary support and aseries of movable Copies of thlscpatent may. be obtained for elongatedflat dies in endless'chain formation contacting with the tube under theroll, and means formowingflie oontimlnusty to I and from, smpmi rtmg 5gnition.

The device of claim 1 with the addition of guiding means for the dies.

3. In a tube forming machine, in combimrwbionna forming roll, aplmeiswfiifl e opposite the same, an endless series of flat forming diesand means for moving said dies longitudinally with theitub eiover theplane surfaee.

1. In a tube forn'tingi machine, in combination, a. forming roll, aplene' surfaeeopposite the same, an. endless series' of forming dies andmeans for moving said dies longitudinally with the tube over the planesurface, at least two of said (lies being on the surface together, andforming thereon a continuous the surface which engu es the tube.

11 witness whereof I have hereunto set hand in the presence of twowitnesses.

J AMES LUTHER HOSAGKS Witnesses HENRY A. 'LITILE, ADELENE MACKA'Y.

the cents each,-ny addressing the Gmhmissiontr at flaunts.

Washington, 3.0.

